Reading a Ruler
Objective:
1. KNOW HOW TO USE A RULER PROPERLY.
2. UNDERSTAND how to find halves (1/2), quarters
(1/4) and eighths 1/8 measurements
TODAY’s AGENDA:
•COMPELTE THE PRETEST IN 5 MINUTES
•GO OVER PRETEST ANSWERS
•REVIEW HOW TO USE RULER
#1 reason kids get measuring WRONG…not
noticing where the 0 is located!
Notice where the "0" line falls on the ruler. Some rulers have this line at the exact
edge of the ruler and other rulers place this line slightly to the right of the edge.
The location of the "0" line is important for accurate measuring because you must
place this point on the ruler at the exact edge of the item or space you're measuring.
BOTH RULERS ARE CORRECT TOOLS FOR MEASURING! IT IS
YOUR REPSONSIBILITY
TO ALWAYS START MEASURING AT THE ZERO!
Reading a Ruler
Pretest
1
2
3
4
5
1
2
3
4
5
Reading a Ruler
Pretest Answers
1
1
15 8
2
23 8
1
8
1
5
1
33 4
4
2
21 2
2
41 4
4
47 8
43 8
31 4
3
5
35 8
278
11 8
1
31 8
3
13 4
8
5
4
5
Reading a Ruler
Fraction Review
A circle can be divided into many parts. For
purposes of this review, the circle will be
divided in to halves, quarters, and eights.
Reading a Rule
Fraction Review
1/2
1/2
Here the circle is divided into halves (two
parts). If you add the two halves, what do
you get for an answer?
Reading a Ruler
Fraction Review
1/4
1/4
1/4
1/4
Here the circle is divided into quarters (four
parts). If you add the four quarters, what do
you get for an answer?
Reading a Ruler
Fraction Review
1/8
1/8
1/8
1/8
1/8
1/8
1/8
1/8
Here the circle is divided into eight parts. If
you add the eight parts, what do you get for
an answer?
Reading a Ruler
Fraction Review
1
1”
An inch can also be divided into many parts.
For purposes of this review, the inch will be
divided in to halves, quarters, and eights.
Reading a Ruler
Fraction Review
1
1
2
2
Halves
1”
Here the inch is divided into halves (two
parts). If you add the two halves, what do
you get for an answer?
Reading a Ruler
Fraction Review
1
4
1
1
4
4
1
4
Quarters
1”
Here the inch is divided into four parts. If
you add the four parts, what do you get for
an answer?
Reading a Ruler
Fraction Review
1
8
1
8
1
8
1
8
1
8
1
8
1
8
1
8
Eights
1”
Here the inch is divided into eight parts. If
you add the eight parts, what do you get for
an answer?
Reading a Ruler

What do you think the missing
measurement is?
1/2”
1”
1
1 1/2”
2
Reading a Ruler

What do you think the missing
measurement is?
1/2”
1”
1
1 1/2”
2”
2
Reading a Ruler

What are the missing measurements?
1/4”
1 1/4”
3/4”
1/2”
1”
1
2
Reading a Ruler

What are the missing measurements?
1/4”
1 1/4”
3/4”
1/2”
1”
1”
1
2
Reading a Ruler

What are the missing measurements?
1/4”
1 1/4”
3/4”
1/2”
1”
1”
1
1 1/2”
2
Reading a Ruler

What are the missing measurements?
1/4”
1 1/4”
3/4”
1/2”
1”
1”
1
1 3/4”
1 1/2”
2
Reading a Ruler

What are the missing measurements?
1/4”
1 1/4”
3/4”
1/2”
1”
1”
1
1 3/4”
1 1/2”
2”
2
Reading a Ruler

What are the missing measurements?
1/8”
3/8”
1/4”
5/8”
1/2”
7/8”
3/4”
1 1/8”
1”
1
1 3/8”
1 5/8”
1 1/4”
2 1/2”
2
Reading a Ruler

What are the missing measurements?
1/8”
3/8”
1/4”
5/8”
1/2”
7/8”
3/4”
1 1/8”
1”
1
1 3/8”
1 1/4”
1 5/8”
1 1/2”
2 1/2”
2
Reading a Ruler

What are the missing measurements?
1/8”
3/8”
1/4”
5/8”
1/2”
7/8”
3/4”
1 1/8”
1”
1
1 3/8”
1 1/4”
1 5/8”
1 1/2”
1 3/4”
2 1/2”
2
Reading a Ruler

What are the missing measurements?
1/8”
3/8”
1/4”
5/8”
1/2”
7/8”
3/4”
1 1/8”
1”
1
1 3/8”
1 1/4”
1 5/8”
1 1/2”
1 7/8”
1 3/4”
2 1/2”
2
Reading a Ruler

What are the missing measurements?
1/8”
3/8”
1/4”
5/8”
1/2”
7/8”
3/4”
1 1/8”
1”
1
1 3/8”
1 1/4”
1 5/8”
1 1/2”
1 7/8”
1 3/4”
2”
2
2 1/2”
Reading a Ruler

What are the missing measurements?
1/8”
3/8”
1/4”
5/8”
1/2”
7/8”
3/4”
1 1/8”
1”
1
1 3/8”
1 1/4”
1 5/8”
1 1/2”
1 7/8”
1 3/4”
2 1/8”
2”
2
2 1/2”
Reading a Ruler

What are the missing measurements?
1/8”
3/8”
1/4”
5/8”
1/2”
7/8”
3/4”
1 1/8”
1”
1
1 3/8”
1 1/4”
1 5/8”
1 1/2”
1 7/8”
1 3/4”
2 1/8”
2”
2
2 1/4”
2 1/2”
Reading a Ruler

What are the missing measurements?
1/8”
3/8”
1/4”
5/8”
1/2”
7/8”
3/4”
1 1/8”
1”
1
1 3/8”
1 1/4”
1 5/8”
1 1/2”
1 7/8”
1 3/4”
2 1/8”
2”
2
2 3/8”
2 1/4”
2 1/2”
Reading a Ruler

What are the missing measurements?
1/8”
3/8”
1/4”
5/8”
1/2”
7/8”
3/4”
1 1/8”
1”
1
1 3/8”
1 1/4”
1 5/8”
1 1/2”
1 7/8”
1 3/4”
2 1/8”
2”
2
2 3/8”
2 1/4”
2 1/2”
2 5/8”
Name:
Period:
Reading a Ruler
Post Test
1
2
3
4
5
1
2
3
4
5
Reading a Ruler
Post Test Answers
1
1
15 8
2
23 8
1
8
1
5
1
33 4
4
2
21 2
2
41 4
4
47 8
43 8
31 4
3
5
35 8
278
11 8
1
31 8
3
13 4
8
5
4
5
Reading a Rule
1
8
1
8
1
8
1
8
1
8
1
8
1
8
1
8
Eights
Sixteenths
1”
1”
An inch is often divided into sixteen parts.
Count the spaces in the inch on the right side
of the slide. How many are there?
All the red fractions can be reduced. Do you see any
patterns?
0
1
1
8
1
4
1
2
3
8
5
8
3
4
7
8
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 16 16 16 16 16 16 16 16 16 16 16 16 16 16